2020 BMW 4 Series 2.0 420i M Sport

Overview

• Make: BMW
• Model: 4 Series
• Trim: M Sport
• Version: 2.0 420i M Sport Auto RWD Euro 6 (s/s) 2dr (181 bhp)
• Year: 2020
• Mileage: 36,608 miles
• Fuel: Petrol
• Body: Coupe, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Black
• CO2: 151 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 36,608 miles on the clock, this 2020 BMW 4 Series M Sport has done roughly 5,900 fewer miles than a typical 2020 BMW 4 Series. The dealer is asking £18,260, which is £3,014 below the AskCar estimate of £21,274. To work out the AskCar estimate, we analyse UK dealer adverts for 1,787 BMW 4 Series cars across different ages and specifications. Since we first spotted the advert 18 days ago, the asking price has dropped by £940. The government's MOT record matches its advertised mileage. You can find this car at SKV Motors in Romford. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 2 November 2026.

How we estimate prices and check cars

Price

Good value: £3,014 (14%) under the AskCar estimate of £21,274.

The AskCar estimate is our expected asking price for this car. It uses UK dealer asking prices, accounting for make, model, trim, version, age, mileage, fuel, gearbox, body type, driven wheels, engine size and power. It is an advertised price, not a confirmed sale price.

It draws on 1,787 priced BMW 4 Series adverts across different ages and specifications, as of 2 November 2026.

A 2020 BMW 4 Series with the 2.0 petrol engine is typically advertised at £19,500: the median of the 37 for sale on AskCar, as of 2 November 2026.

Time on sale

This 2020 BMW 4 Series has been on sale for at least 18 days.

Price history

AskCar first saw this advert on 15 October 2026 at £19,200. Its asking price is now £18,260, £940 less. The latest price cut was seen on 25 October 2026.

Price changes recorded:

• 15 October 2026: £19,200
• 25 October 2026: £18,260

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 11 April 2027.

It has had 6 MOTs. The latest, on 10 April 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 35,479 miles, which matches the advertised 36,608 miles.

Advertised mileage is about 5,900 miles lower than the median mileage of a 2020 BMW 4 Series on AskCar.

Similar cars

14 other 2020 BMW 4 Series M Sport 2.0 petrol automatic coupes are for sale at UK dealers, from £14,790 to £53,950, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2020 BMW 4 Series M Sport, 2.0 petrol coupe, grey. Mileage: 36,589 miles. Price: £20,995, £2,735 more than this car. Dealer: Group 1 Farnborough BMW in Farnborough. AskCar page: https://askcar.co.uk/car/bmw-4-series-2020-61b99f000204
• 2020 BMW 4 Series M Sport, 2.0 petrol coupe, silver. Mileage: 36,373 miles. Price: £17,999, £261 less than this car. Dealer: cinch Corby in Corby. AskCar page: https://askcar.co.uk/car/bmw-4-series-2020-873241c52bd2
• 2020 BMW 4 Series M Sport, 2.0 petrol coupe, blue. Mileage: 35,639 miles. Price: £24,495, £6,235 more than this car. Dealer: MINI UK at Barretts Canterbury in Canterbury. AskCar page: https://askcar.co.uk/car/bmw-4-series-2020-d5ad166b2bb0

• The nearest: 2020 BMW 4 Series M Sport, 2.0 petrol coupe, blue, 15 miles from this car. Mileage: 19,927 miles. Price: £16,350, £1,910 less than this car. Dealer: Car Planet Barnet in Barnet. AskCar page: https://askcar.co.uk/car/bmw-4-series-2020-74ef8c894940